I have two more on my shelf that I think I'll finish and deck out with Fusion. I really want to work the non-Commander List angle a bit more, and now I'm encouraged to try. I'm also pretty optimistic that the Ghostkeel feels about right points-wise and is less likely to be adjusted in Chapter Approved or the Codex. However, I do think two things are primed to change, that might give the Ghostkeel a buff indirectly.
One, I would not be surprised to see the Markerlight table get a re-work. I like the new system of leaving the tokens out and all units benefiting from them. That almost seems inspired by the same type of idea that Coordinated Firepower was, but works simply while being fluffy. It also doesn't punish an MSU approach to list building like the old Markerlights did. If +1 BS gets lowered, or some type of wound assistance shows up (re-roll 1s is fairly common in other Factions), or really anything that generally makes the Markerlight table increase the effectiveness of either volume of fire shooting or quality shooting, the Ghostkeel can capitalize on either or both.
Secondly, if Battlesuits in general get some buffs, that would not be shocking. Multi-Trackers and Blacksun Filters used to be standard on all suits, and many people still have suspicions that Jet Pack and/or Battlesuit keywords may be getting some utility. If we get our Support Systems changed a bit, or see new ones, the Ghostkeel is in a nice spot to make opportune use of beneficial ones due to it's flexible loadout and medium pricetag.